Abstract: Provided is a compound useful as an active ingredient of an agricultural and horticultural chemical agent, in particular, an agricultural and horticultural pest control agent such as an agricultural and horticultural insecticide or an agricultural and horticultural mite control agent. The compound is an imidazopyridine-2-carboxamide derivative or its N-oxide or salt represented by the following formula (1): in the formula, R1 and R2 are, for example, C1-3 alkyl groups, X is, for example, an oxygen atom or a sulfur atom, A1, A2, A3, A4, and A5 are each independently a nitrogen atom or C—R3, R3 is, for example, a hydrogen atom or a C1-3 haloalkyl group, and R4 is, for example, a C1-3 alkyl group or a C1-3 haloalkyl group.